Anrtisu Cell Master MT8212B, Руководство пользователя, Страница: 119 / 294

q
External Manual
— The Cell Master uses an external even second
time mark as the timing reference. This is usually available at the base
station on a BNC connector labeled as "ESTM" or "PP2S". This
ESTM must be connected to the
CDMA Timing Input
connector on the
Cell Master. The Cell Master will search only for the specified PN.
q
No Trigger
— If both GPS and external timing are unavailable, choose
No Trigger for the PN search.
q
Data Modulation Type
— In EVDO, the modulation can vary depending
upon the location. Different modulation types, QPSK, 8-PSK and 16-QAM
are supported. Select
Auto
to demodulate any type of modulation. To de-
modulate a specific modulation type select the appropriate soft key.
q
Advanced Settings
— Advanced settings include the measurement length
and the external trigger polarity.
q
Meas Speed
— Sets the speed of the measurement. Use the Up/Down
arrow key to select
FAST
,
NORMAL
or
SLOW
. Press ENTER to ac-
cept or ESCAPE to restore the previous value.
q
Ext Trigger Polarity
— The EVDO timing input can use the rising edge
or the falling edge of the ESTM as the zero point in time.
q
Back
— Returns to the previous menu.
q
Back
— Returns to the previous menu.
Chapter 2 Functions and Operations
2-95